please provide help in xml pares error

["malayappa2000" <malayappa2000@xxxxxxxxx>]

Hi All

fallowing is my parsing function code 

$parser=xml_parser_create();
xml_set_element_handler($parser, "startElement", "endElement");
xml_set_character_data_handler($parser, "characterData");
xml_parse($parser, $this->xml, true)
			or die(sprintf("XML error: %s at line %d", 
				xml_error_string(xml_get_error_code($parser)), 

i am unable to get the document last line xml_parse not parsing the documnet getting die message

please advice some thing 

Thanks and regards
srinivas pmm